PDH/SDH网络测试仪 Tektronix CTS-850

CTS-850说明书下载

特点

STM-0, STM-1, and STM-4 Transmit and Receive
STM-16 Transmit and Receive (with ST2400A)
VC4-4c Concatenated Payload Testing
2, 8, 34, and 140 MBps PDH Mux/Demux with N/M × 64 Kbps Testing
45 MBps (DS3) Mapping/Demapping
Complete Jitter and Wander Tests at All Equipped Line Rates from 2 MBps to 622 MBps in One Option Plus 45 MBps. Exceeds New ITU-T O.172 Requirements
Real-Time Wander Analyst Application Software for MTIE, TDEV, Frequency Offset, and Drift-Rate Measurements
Performance Analysis per G.821, G.826, G.827, M.2100, and New M.2101.1
Full-Band Jitter Measurements to 0.1 Hz with Variable Highpass Cutoff Frequencies
Pointer Analysis and Test Sequences per G.783
SDH/PDH Defect Generation and Analysis
Manipulation of K1/K2 Bytes for MSP/APS Testing
Field-interchangeable 1310 nm and 1550 nm Optical Interfaces
AutoScan with Graphical Display of Signal Format and Payload
Histogram Results, Correlated Alarms, Defects, Errors, and Events to 1-Second Resolution
Pass/Fail Tests Saved and Recalled by Using a Floppy Disk
Exclusive New Measurements for Digital Video Network Characterization

应用领域

Network Integrity Testing
Mapping/Demapping
MSP/APS Testing

支持新ITU-T O.172标准测试

The CTS850 is a versatile analyzer for Broadband Network Testing. It has a powerful, yet uncomplicated, menu structure which allows both the novice and expert user to accurately configure measurements on SDH and PDH networks very quickly. All measurement connections are conveniently located directly on the front panel close to the signal status LEDs and easy-to-read display.

A field-interchangeable optical module and a floppy disk drive for retrieval of stored setups and results complete the front-panel layout to create a "field-friendly" instrument.

SDH/PDH/Jitter and Wander Testing

The CTS850 creatively addresses growing concerns surrounding hybrid SDH/PDH networks in the area of timing and synchronization. Its industry-leading, DSP-based, Jitter and Wander measurement capability provides a high 300 UI jitter measurement range, handles all line rates from 2 MBps to 622 MBps through existing front-panel connectors and introduces exclusive new measurements for digital video services.

The CTS850 unlocks the power of the SDH frame structure by combining bit error testing with overhead analysis and payload mapping and demapping. It provides read/write access to overhead bytes, DCC add/drop, and complete G.783 pointer test sequences.

The CTS850 is optimized for installation and maintenance of both current and future SDH networks. Additional functionality, reflecting evolving standards such as new O.172, can be downloaded through the built-in disk drive.

One of the CTS850s many powerful functions is error analysis and display. In addition to simple error counts and rate determination, the CTS850 makes measurements according to G.821, G.826, G.827, and new M.2101.1 performance analysis and M.2100 error analysis so that network quality of service can be fully verified in or out of service.

Histograms boost the power of error analysis by enabling an easy correlation of time-critical events. Thus, time-consuming searches through long strips of error printouts are eliminated, freeing you to spend time fixing problems, not finding the cause.

PDH Testing

Many networks have evolved from PDH to include SDH rings and long-distance, high-capacity trunks. The PDH network segments are commonly retained for access, service delivery, and economic reasons. The CTS850 Opt. 38, PDH Tributary card provides features for testing and accessing PDH subrates from 140 MBps, 34 MBps, 8 MBps, 2 MBps, down to N/M × 64 Kbps. Additional PDH test features also include simultaneous multilayer G.826, M.2100 results, Round Trip Delay, Voice Channel Monitor, and Burst FAS Errors.

This option also empowers the CTS850 with mapping and demapping of 2, 34, and 140 MBps payloads in virtual containers and testing of TU-12, TU-3 and AU-4 overheads, making it ideal for testing hybrid networks.

Jitter and Wander Testing

To support current and emerging ITU-T and ETSI standards, CTS850 Opt. 14 for Jitter and Wander provides the most comprehensive, easy-to-use measurements for both SDH and PDH equipment and networks.

The CTS850 is the first test set to fully conform to the requirements of the new ITU-T O.172 (Jitter/wander test for SDH networks). So for the first time, measurements of pointer jitter can be made reliably and accurately. Widely variable results are a thing of the past.

With its wide-ranging and comprehensive generation, analysis, pointer movement, automated jitter output, transfer, and tolerance testing, the CTS850 is the complete solution for your current and future test requirements.

Also included in Opt. 14 is Real-Time Wander Analyst application software for MTIE and TDEV parameter analysis. Now you can fully test and qualify the timing and synchronization of your new SDH/PDH equipment and networks. Jitter history histograms can be correlated with simultaneously-acquired Wander TIE data so troublesome conditions can be quickly diagnosed.

Video Service Performance and 45 MBps Mapping and Demapping

Digital video services demand a more stringent level of SDH/PDH timing and synchronization performance than many other services. The CTS850 Opt. 14 provides exclusive new measurements at the network interface to assess video service performance. Also, CTS850 Opt. 55, provides the ability to test 45 MBps Mapping and Demapping, including Jitter and Wander testing, to bring the CTS850s advanced benefits to Video Service Measurement.

Flexible and Easy-to-Use

Feature	Benefit
Graphical display of AU/TU payload and alarms (AutoScan)	Provides the fastest signal identification. Allows quick identification of incorrect provisioning and easy location of the customers signal path.
Pass/fail tests can be created, stored, and executed in the field	Ensures a uniform test methodology in an increasingly diverse network. Allows faster installation and responsive maintenance.
3.5-in. floppy disk drive	Distribute firmware updates in the field. Archive pass/fail tests and test results. Document operating- and result-screen bitmaps.
Measurement histograms with up to 1-second resolution	Allows visual presentation of measurement results to customers. Correlate alarms, errors, pointer movements, etc.
Cleanly structured menu system	Enables all users (technicians, experts and occasional users) to be immediately productive.
Large, bright CRT user interface	Easy-to-see in low lighting conditions. Histogram resolution is clearly visible.

SDH Testing

Feature	Benefit
STM-0, STM-1, and STM-4 Transmit and Receive	STM-0 (51 MBps) is becoming more prevalent in radio links/ subsystems and SDH access systems.
STM-16 Transmit and Receive (with ST2400A)	Test STM-1/4 payloads in STM-16 ring.
Performance analysis to G.821, G.826, and new M.2101.1, M.2100 error analysis on all SDH/PDH layers simultaneously	Simplified testing for correct error performance compliance on both in-service and out-of-service systems.
Pointer test sequences exceed requirements of G.783	Thoroughly stress the margins of equipment performance.
SDH/PDH defect generation and analysis	Verify correct network response at all layers.
Set and detect K1/K2 bytes. Generate linear and ring messages to G.841 and G.783.	Send standard network messages and monitor network response. Verify protection switching system.
Interchangeable 1310 nm and 1550 nm optical interfaces	Swap between Long Haul/Short Haul trunk testing.
VC4-4c testing for concatenated payloads	Efficiently qualify transport of concatenated 622 MBps data for IP and ATM applications.

45 MBps (DS3) Testing

Feature	Benefit
45 MBps (DS3) Mapping/Demapping and Jitter/Wander Testing	Focus on new 45 MBps services and video quality testing. Complete set of jitter and wander conformance tests with specification limits.

PDH Testing

Feature	Benefit
Test 2, 8, 34, 140 MBps directly at each line rate	Make traditional PDH measurements when necessary.
Map unique test patterns into TU-12, TU-3, and AU-4 containers	Verify correct provisioning and payload integrity.
Test PDH signals dropped from SDH rates	Monitor PDH services to verify tariffed performance.
Add/Drop external 2, 34, and 140 MBps signals to/from SDH containers and induce timing impairments.	Generate SDH test signals using customer-generated PDH traffic. Add pointer sequences, test pointer hit tolerance of terminals and desynchronizers.
Mux/Demux N/M × 64 Kbps and subrate PDH signals into/out of higher-speed PDH signals	Verify correct PDH multiplexer/demultiplexer service configuration for data and video conferencing.
Round trip delay testing	Measure round-trip delay for data and voice services.
2 MBps Channel-Associated Signaling	Verify channel-busy occupancy and utilization.

Jitter/Wander Testing

Feature	Benefit
Exceeds new ITU-T O.172	Fully conforms with requirements of new ITU-T O.172 (jitter/wander test sets for SDH networks). DSP engine provides precise measurement filter characteristics - unlike previous O.171 test sets, pointer jitter is reliably and accurately measured.
SDH/PDH Jitter and Wander testing from 2 to 622 MBps.	Most complete solution in one option supports installed interfaces for both generation and analysis (including 45 MBps).
Automatic built-in conformance tests for output jitter, jitter tolerance, jitter transfer, pointer jitter	Perform all standard ITU-T SDH/PDH equipment and network jitter/wander tests with quick, simple pass/fail tests. Supports G.783, G.823, G.824, G.825, G.958, G.735, and G.751 specifications.
New Video Timing Quality measurements: Frequency drift-rate (ppm/sec)	Allows characterization of SDH networks for video applications. Correlate SDH pointer activity with video subcarrier and Hsync drift.
DSP Jitter and Wander measurement technology.	Standards requirements can easily be updated in firmware and distributed on a floppy disk. Measurements are more repeatable and reliable between two test sets. Allows existing customers test sets to be firmware-upgraded to support new O.172.
Combined mapping and pointer jitter testing function	Allows testing of tributary jitter caused by G.783 SDH pointer test sequences together with PDH mapping frequency offset.
Up to 100,000 UI wander and 300 UI jitter generation ranges exceed requirements of G.823, G.824, G.825, and new O.172	Enables full margin testing of low-frequency jitter/wander and full input tolerance testing.
300 UI jitter measurement range allows measurement of Pointer Hits	Test set stays in lock, identifies/logs Pointer Hits on PDH service when dropped from SDH network.
SDH/PDH line/clock wander and frequency measurement on all installed interface rates	Allows diagnosis of network synchronization problems in the field.
Full set of standard measurement filters in conformance with new O.172 plus measurements to 0.1 Hz	Ensures reliable and accurate measurements of pointer jitter, improves accuracy of line jitter measurements. Full-band jitter measurement (down to 0.1 Hz) allows characterization of phase transients that affect video, ATM, and PDH service quality.
MTIE and TDEV wander parameter analysis	Real-Time Wander Analyst software provides pass/fail testing to the most recent ITU-T, ETSI, ANSI, and Bellcore standards. Also provides frequency-offset and drift-rate analysis.